New Parts launched for GM Duramax, Dodge/Ram Cummins and Ford Powerstroke

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Manifolds and Pipes That Don't Crack

The factory Duramax manifolds and pipes crack and leak from heat cycling, which drops boost and raises EGTs. These high-flow stainless manifolds and turbo exhaust pipes resist the cracking and flow better — including a no-pinch driver-side manifold that addresses a known factory restriction.

Fits these trucks

  • GMC/Chevy 6.6L Duramax — LB7 (01–04), LML (11–16), L5P (17–25) high-flow exhaust manifolds
  • Duramax LB7 & LML — 3" high-flow turbo exhaust pipes (with heat wrap)
  • No-pinch driver-side exhaust manifold (2001–2015)

Frequently Asked Questions

Why do Duramax manifolds and pipes crack?
Heat cycling under towing and load fatigues the factory parts until they crack and leak — costing boost and raising EGTs.
What's a "no-pinch" manifold?
The factory driver-side manifold has a restriction; a no-pinch design opens it up for better flow.
What does high-flow stainless get me?
Stronger construction that resists cracking plus larger ports for less backpressure and lower EGTs.
Will it fit my truck?
Match your year and engine code (LB7–L5P) on the product page. Get the right part the first time.